On April 22, 1945, a victorious U.S. Army destroyed one of the greatest symbols of Germany’s Nazi regime: a giant marble swastika that overlooked the Zeppelintribüne, Adolf Hitler’s most powerful pulpit, at the heart of the Nazi party rally grounds.

Imagine an army made up of soldiers that could go days without sleep, had endless aggression, and weren’t afraid of anything. In the early days of World War II, a Berlin-based drugmaker called Temmler Werke produced a pharmaceutical that made German soldiers fearless in battle. That drug was crystal meth.

Ever wonder why Vladimir Putin rides a horse shirtless, what the nuclear launch codes are, or what negotiations between the U.S. military and a North Korean ambassador might look like? Late-night talk show host Seth Meyers went and found out.

In life, Adolf Hitler was many things: a failed painter, decorated soldier, Germany’s “last hope,” and eventual mass murderer of more than six million Jews. But, according to one author, he was also a “gibbering super junkie.”